Leonard henkle



(No Model.)

- L. HENKLE.

V LAMP. N0. 365,996. Patented July 5, 1887.

Z 22 zfezzzlo a? LEONARD HENKLE, OF ROCHESTER,

ATENT ASSIGNOR TO CHARLES STANFORD UPTON, OF NEYV YORK, N. Y.

LAMP.

SPECIFICATION forming part of Letters Patent No. 365,996, dated July 5,1887.

Application filed December 9, 1885. Serial No. 185,128. (No model) Toall whom zit may concern;

Be itknown that I, LEONARD HENKLE, of Rochester, in the county of Monroeand State of New York, have invented an Improvement in Lamps; and I dohereby declare that the following is a full and exact description. ofthe same, reference being had to the accompanying drawings, making partof this specification.

This invention has been in part embodied in an English Patent No. 2,221,granted to Julius-13oult on communication by me, and dated the 26th ofJanuary, 188-1.

M y improvementrelates to the construction of the perforated cones, suchas described in the Letters Patent No. 292,114, granted to me January15, 1884, for directing the inner draft of Argand lamps upon the flameto improve the combustion of the oil vapor or gas. This cone, preferablyand generally made of finely-perforated sheet metal, is removablyinserted in the upper end of the inner draft and wick tube; and, sinceitis made somewhat smaller in exterior diameter than the interiordiameter of the said tube, so as not to be in contact therewith, andthereby not to impart its heat to the tube, and so as to allow thedraft-air to pass through it throughout its entire length, as far aspracticable, my invention consists in the means of holding the conesteadily and adj ustably in the tube, and thus allowing the differencein diameters of the two parts, as specified.

The invention consists in outward projections or bosses formed on thecone by swaging the metal of the same outward, substantially ashereinafter set forth.

The invention also consists in forming the cone or thimble of a singlepiece of metal and providing it with an imperforate top or cap and anoutwardly-projccting retaining flange or rim, which flange or rim seatsupon a stop or a bead formed upon the central draft-tube, and in otherfeatures of construction, hereinafter described and claimed.

Figure 1 of the accompanying drawings represents a side View of a coneformed with my improvement; Fig. 2, a top view of the same; Fig. 3, acentral vertical section of the cone placed in the inner draft and wicktube; Fig.

4, a side view of a cone with a modified form of the invention; Fig. 5,a side view of a cone with another modified form of the invention.

Like figures designate corresponding parts in all of the figures.

In the drawings, A represents the inner draft and wick tube, and B theperforated cone of an Argand lamp. In order to hold the cone of smallerdiameter in the tube of larger diameter, so as to be retained centrallytherein, several small bosses or outward projections, a a, are swaged orstamped in the cone from the inside outward, or otherwise formed, theoutermost part of the same being preferably rounded and of justsufficient projection to touch the inner surface of the tube, as shownin Fig. 3. The apex of each boss or projection is quite narrow, and whenof the rounded form shown touches the tube only tangentially andconsequently with a very narrow contact therewith suflicient to hold thecone in place. They fit in the tube with just enough friction orpressure to retain thecone firmly and securely in place in any positionof adjustment in the tube. There may be three or four of the bosses orprojections on each cone 10- cated at intervals around its periphery,and preferably at equal or nearly equal heights. They properly may besimply round, as shown in Fig. 1, or somewhat oblong, as shown in Fig.4, or still more elongated vertically, as shown in Fig. 5, or of anyother equivalent form or arrangement. As in Figs. 1 and 4:, they may beused in connection with a slightly outturned edge or rim, b, at thelower open end of the cone, reaching quite nearly to the interiorsurface of the tube, though preferably not quite filling the same, asshown in Fig. 8, except, if preferred, at two or three points, this rimalso serving as a stop to strike an inncr head or projection, c, on theinner surface 0 of the tube, to limit the extent to which the cone maybe inserted in the tube. The cone may be adjusted in position above thislowest limit to as high a position asthe bosses at a will permit withoutcoming out of the tube, 5 the bosses being located as high on the coneas the necessary extent of adjustment will allow. NVith the elongatedbosses, as shown in I ro Fig. 5, no rim or outward turning on the lowerend of the cone is necessary for the simple purpose of holding the conein the tube.

There are superior advantages in this kind of holding projections orstays over either of the constructions mentioned in my former LettersPatent above referred to. First. No addi' tional parts are required intheir formation, and in this respect the construction is cheaper, norare any of the parts liable to be torn off, as is the case with eitherof the constructions above referred to. Second. These projections aremore quickly made and applied than by either of the other ways, and inthis respect the construction is also quicker and cheaper. Third. Theseoutwardlyswaged projections, being also finelyperforated, do not impedethe passage of air through the cone at any point nor lessen the same. 7In the claims, wherein mention is made of the combination of theoutwardly-swaged portions at with a projecting'portion in a differenthorizontal plane, it is intended by this lan guage to include the twoequivalent forms 2 5 shown in the drawings, and referred to aboveto Wit,one in which a projection, I), as in Fig. 1, supports the cone in axialposition, from Which it might otherwise depart, owing to the roundedform of portions a, and one in which the portions (1, as in Figs. 4 and5, are made ofsufficient length to provide steady bearing for the cone,and so support it in vertical position. In these latter cases one end ofeach projection may be considered the outwardlyswaged portion and theother end the proj ecting portion in a different horizontal planetherefrom.

I claim as my invention- 1. In a central-draft lamp-bur11er, and in 4ocombination with the central tube, a cone or thimble having its sidesperforated, having outwardly-swaged portions in its sides to seatagainst the tube, and aprojecting flange or rim in a differenthorizontal plane from said outwardly-swaged portions, whereby said coneis adapted to seat against the sides of the tube and is maintained inupright position.

2. The combination, in a central-draft lamp, the central tube of whichis provided with a bead or stop, of a removable cone or thimblehavingits sides perforated, and having an outwardly-turned flange or rimadapted to seat on said bead or stop.

3. The combination, ina central-draft lamp, the central tube of which isprovided with a bead or stop, of a cone or thimble having its sidesperforated, and having outwardly-swaged projections in said sides and anoutturned flange or projection at its lower end, having seating on saidhead or stop, substantially as set forth. 1

4. The combination, with the central tube 'of a central-draft lamp, of acone or thimble formed in one piece, having an imperforate top andperforated sides having outwardlyswaged projections adapted to seatagainst the sides of the tube, and a projection or outturned portion atits lower end also seating against said tube, substantially as setforth.

5. A removable cone 9r thimble made of a single piece of metal havingperforated sides, in combination with the central tube of an Argandlamp, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence oftwosubscribing witnesses.

' LEONARD HENKLE. Witnesses:

R. Osooon, P. A. CosTIoH.

